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公开(公告)号：US3020348A
公开(公告)日：1962-02-06
申请号：US77099658
申请日：1958-10-31
Applicant: BELL TELEPHONE LABOR INC
Inventor： CATH PIETER G
IPC: H04M17/02
CPC classification number: H04M17/023
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公开(公告)号：US3086081A
公开(公告)日：1963-04-16
申请号：US80525759
申请日：1959-04-09
Applicant: BELL TELEPHONE LABOR INC
Inventor： CATH PIETER G , HILL LESTER O
IPC: H04M17/02
CPC classification number: H04M17/02
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公开(公告)号：US3046355A
公开(公告)日：1962-07-24
申请号：US70599657
申请日：1957-12-30
Applicant: BELL TELEPHONE LABOR INC
Inventor： CATH PIETER G , WILLIAM PFERD
IPC: H04M17/02
CPC classification number: H04M17/02
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